Coppard, Brenda M.
Elsevier , 2008
Buku Teks
Burghardt, M. David
McGraw-Hill, 1999
Buku Teks
Hoover, Stewart V., author
Addison-Wesley, 1990
Buku Teks
Keedy, Mervin L., author
Addison-Wesley, 1986
Buku Teks
edited by Rachel Brown-Chidsey, Kristina J. Andren
The Guilford Press, 2005
Buku Teks